Complete the indicated task to unlock the corresponding achievement.
Complete the indicated task to unlock the corresponding card.
Defeat the desired Hero in Practice or Play mode.
Unlock all heroes.
Win 50 games against human players in Play mode. You now can start daily quests with larger gold rewards.
Complete the indicated task to unlock the corresponding card back. You can change how the backs of your cards appear by entering the "Options" menu and selecting one of the card backs you have unlocked. Note: Card backs that have a calendar requirement not be become available until after the end of that specific month.
Complete the tutorial.
Complete the indicated task to unlock the corresponding bonus.
Complete the indicated task to unlock the corresponding reward.
Unlock every Hero. Adventures can then be purchased using gold or with actual currency.
Have any class reach Level 20.